Furnace.



F. J. DOYLE.

FURNACE. APPLIOATION FILED 0015, 1909. RENEWED JAN. 27, 1913.

1 ,108,976, Patented Sept. 1, 1914.

3 QHEBTS-SHBET l.

r M W 0 I $1 j Mg? THE hORRlS PETERS CO. PHOTDILITHQ. WASHINGTON, D. c.

F. J. DOYLE.

FURNACE. APPLIOATION FILED 00w. 5, 1909. RENEWED JAN. 27, 1913.

1,108,976. Patented Sept. 1, 1914.

3 SHEETS-SHEET 2.

ERS co.,FHo1n-L!THO.. WASHINGTON. u. C.

THE .JvRRIS PET F. J. DOYLE.

FURNACE. APPLICATION FILED 0015,1909. RENEWED JAN. 27, 1913.

1,108,976. Patented Sept.1,1914.

"""""" figmimuum in YHE I'JJRII! PIPER! PHOITD-LITHOY. WASHINGTON, D. C

' .through a system i being had to the ful I I rimivois J. DOYLE, or cHIoAGoJIiLI Nois. l

summon.

Application fiIed October 5, 1909, Serial No. 521,103. Renewed-January To all whom it may concern:

Be it known that I, FRANCIS JpDovLn, a citizen of the United States, residing at Chicago, inthe county of Cook and'State of Illinois, have invented" certain new. and usemprovements in F urnaces', of which the following is a specification. I

This invention relates to improvements *in furnacesfand refers.morespecifically to a- 10 f iurnace provided with airegenerative combustion chamber as an auxiliary to the pi m'ary combustion chamberof the furnace.

Among the salient objects of the present invention are,

efliciency secured to provide a construction in which the usual fire box or primary combustion chamber ofthe furnace is utilized chiefly as a gas distillating device while the principal combustion'oocurs in the auxiliary combustion chamber which is located out side of the main body of the furnacebut within the sheet metal casing thereof and is therefore capable of more effectively radiatingtheheatgenerated therein than would be the case were the regenerative device ar-' ranged within the main body of the furnace; to provide a construction in which the gases of combustion are caused" to circulate of return flues arranged in such manner as to effect a more perfect and-intense combustion; to provide a simple and effective meansfor supplying heated air to the regenerative device; to provide means whereby the whole or only a portion of the. put in use, throw a portion of the regen to provide a construction heating capacity may be ing out of operation erative device; which conforms 111 general appearance to the conventional types of furnaces now in use; and in general to provide a simple and improved construction of the character re ferred-to.

To the above ends the invention consists in the matters hereinafter described and more particularly pointed out in'tlie' appended claims.

The invention will be readily understood from the following description,. reference accompanying drawings, in 1 j Y space against the inner wh1ch- I:

Figure 11s a front elevation of a furnace embodying the present invention; F1 21s Specification of Letters Patent.

a vertical sectional "Fig; 3 1s a top' shown in 1g. 1

tical sectional view of a to provide a construction whereby the smokeand coal gases are more. perfectly consumed and' a, higher heating I view through Fig. 1; plan view of with the upper part ofthe sheet metal casing removed and also the dome of the furnace proper; Fig. 1 is averis a top plan view of mg removed,

Referring to" the drawings,

esignates a sheet metal P tented Se t. 1, 19,114.

275 1 313. Serial No. 744,590.

the furnace modification; Fig. 5} the furnace'shownin Fig. .4 w1th the upper part ofthe outercas- I (Figs. 2 and outer casing provided with outleading hot air conductmg pipes 2.-2,* leading to the apartments'to be heated, and-also with a through which. fuel is fedto'the furnace,

and an ash door 4 opening into thc ash pit "thereof, there. being the usual connection be .tween said doors and the fire boxand ash pit respectively. I I

The furnace proper is located within this casing and comprises a conical base shell 5 .with double'walls to provide an air space 6 therebetween which eommunicateswith the; atmosphere within said outer casingthrouglr openings 7.- .Mounted upon'said base is a fire bowl S'also having double walls to provide a corresponding airspace 9 therebetween, said space beingclosed at its upper edge by the members :9, and communicating at its lower edge with the air space 6. 10 desig hates a grate mountedupona suitable support at the juncture of said base 5 and bowl 8. Mounted upon the upperedge of the in nor wall:ofsaid bowl 8 is a cylindrical member 11, provided on its upperedge with a dome 12 and forming the tion or distilling chamber while-'13 designates a series of partition members mounted upon the inner wall-of primary combussaid cylindric member andforming passageways 14411110 which a portion of the smoke and gases from the fuel v portion of said smoke and gases rises in the primary combustion chamber and is directed I 12 into the upper Y I.

downwardly by the dome end of the passageways 14:, from whichthey escape through. outleading pipes 15 communicating therewith, being" provided on their under. sides with openings 16 communicating vwith the air passing through said space '9, whereby air wall of saidfire bowl feed door 3 i of said furnace,

saidioutleading. pipes 15 pass, whilethe other i I s heated and. conducted into said pipes 15 where itis mixed withthe smoke and gases from the primary combustion chamber as 1 combustion of said. gases takes place.

The regenerative device 17 comprises an the general form of a outer casing having horse shoe and of rectangular form in cross section. 18 designates a downwardly convexed partition casting mountedwithin said outer casing a short distance from the bottom thereof and provided with a seriesot conical flue members 19, upon the upper ends of which rests a plate cas ing 20 extending throughout the length of said outer casing and provided with openings 21 which'register with said flue members, and also provided throughout its length, in thereof, with a series of openings 22 which afiord communication between the space around said flue members 19 and the space above said plate casting 20. Upon the upper outer edges of said plate casting'2O is a cop-extending partition member23 which terminates at its upper edge short of the top ,wall otsai'd outer casing 17,-whi1e' 2l-24 designate a pair of correspondinglyextending partition men bers mounted upon said plate casting 20 and extending to the top of the outer casing 17, in the manner shown, said latter partition members forming a closed chamber 25 between which and the space around said flue members 19, the open ings 22 allord communication. 26 designates an eduction pipe at the rear of the furnace which leads from said chamber 25 and through which the products of combustion are finally carried to the smoke chimney.

It will be understood from the above that as the gases of combustion from the primary combustion chamber pass into the space 1% and out through the connecting pipes 15, supplies of heatedair are mixed from the air passage 9 and the whole passes into the auxiliary combustion chamber or regenerative device 17, passing upwardly through the flue members 19, thence downwardly against the outer wall of the device 17, thence inwardly between the flue memthe chamber 25,

bers 19 and upwardly into trom which they are carriedofi by the eduction pipe 26. The course of this circuitous passage 1S clearly indicated bythe arrows and also the course of the atmospheric air through the base and fire bowl. During the passage of said gases of combustion through said auxiliary combustion chamber, supplied with heated I and intense combustion is obtained, resulting ina great saving of fuel. I

Describing the embodiment shown in 'Figs.

l and 5, the outer sheet metal casing, the,

conical base, primary and a1r passages are combustion" chamber three such devices 27,

the middle ibu stion chambers 27,

:each comprising a cylindrical outer casing communicating at its primary combustion chamber of the furnace therewith air, a more complete primary combustion chamber the same in construo tion' and arrangement as is sl owirin Figs. 2 and 8, but instead of a single auxiliary combustion chamber or regenerative device, 28 and 29 are pro vided, which have communication with the primary combustion chamber through outleading pipes 30, 31. and 32, respectively, which may be provided with dampers, as shown at 33-34-, for controlling the passage from said primary combustion chamber,

thereby making it possibleto use one, two

or all three of said separate devices as may be desired. designates a p pe connecting the discharge of each device and communicating with a final eduction pipe 36 leading to the smoke chimney.

The regenerative devices or auxiliary com- 28 and 29 are alike,

lower side with the through one'of the outleading pipes 30, 31 or 32, and each provided therein near the bottom thereof with a downwardly convexed partition casting 37 having the upstanding conical flue members 38. Upon said flue members is mounted a plate casting 39 provided with openings 87 therethrough which register with said flue members and also provided with a central opening 38 to the space 39 between said conical flue members. d0 designates a cylindrical partition member mounted upon said plate casting and termihating short ofthe top wall of said outer casing. Mounted concentrically within said partition member 4-0 is a second and smaller cylindrical partition member l1 which 'communicates at its lower end with the central opening through said plate casting and at itsupper endwith the connecting pipe 35. It will thus be seen that the gases of combustion pass intoflthe outleading pipes 30, 31 and 32, thence upwardly in the regenerative device through the conical flue members 38 and into the cylindrical member 40, thence downwardly on the outside of said cylindrical member against the outer wall of the device, thence inwardly between the flue members 38 and upwardly throughthe central. o enin 88 in the slate castin into the v O D member 41 and finally into the connecting pipe 35 from which they are conveyed to the eduction pipe 36, the circulating course being substantially the same as that in the construction shown in Figs, 2 and 3.

In both embodiments of the above described invention, the primary object has been to produce a furnace in which a more complete and intense This hasbeen accomplished by utilizing the as a distilling or generating chamber from which the gases of combustion pass into an auxiliary combustion chamber, being supplied with heatcombustion is secured.

ed atmospheric air asthey enter said latter chamber; The circuitous passage through said auxiliary combustion chamber, increas ing in temperature asit advances, results in causing an intense combustion of the gases which are usually passed off through the smoke chimney. c v a While I have herein shown and described what I consider the preferred form of the" invention, it is obvious that many alters tions and modifications in the details of construction and arrangement can be made without departing from the spirit of the invention, and I do not therefore, limit the invention to the details shown and described, except in so far as such details are made the subject matter of specific claims.

I claim:

1. A furnace comprising in combination, an outer casing, a base member, a fire bowl mounted upon said base member, said base member and fire bowl being provided with a surrounding air passage communicating at one end with the outer atmosphere, acylindric member mounted. upon said fire bowl and constituting the primary combustion chamber of the furnace, an auxiliary combustion chamber'withinsaid outer casing and having a circuitous passage there through and connecting members forming passageways from said primary combustion chamber to said auxiliary combustion Cllfllnc ber through which the gases of combustion pass, said connecting members having com munication with said air passage, whereby the gases of combustion are supplied with heated atmospheric air as they *pass'from said primary combustion chamber :into said auxiliar 1 combustion ch mber, for the purpose described. I

2. In a furnace, the combination with the outer casing, fire bowl and combustion chamber thereof, of one or more auxiliary combustion chambers within said outer casing and arranged exteriorly of said primary combustion chamber, connecting pipes between said primary combustion chamber and said auxiliary combustion chamber through which the gases of combustion from said primary combustion chamber pass into said auxiliary combustion chambers, there being air passageways adjacent said fire bowland communicating at one end with the outer atmosphere and at its other end with said connecting pipes whereby heated atmospheric air is mixed with said gases of combustion as they pass from said primary combustion chamber into said auxiliary combustion chamber, said auxiliary combustion chamber being provided with partition members forming a circuitous passage therethrough wherein'a more complete and intense combustion of said gases takes place, and dampers in said connecting pipes for.

3. A furnacecomprisingin combinationa conical base member with double'walls, a fire bowl with double walls mounted upon primary. and auxiliary said base member,whereby an air passage is providedbetween the walls of said base member and fire bowl with an opening to the outer atmosphere, a cylindrical member mountedupon said fire bowl and forming the primary combustion chamber thereof, outleading tion with said air passage, and a regenerative device communicating with said outleading pipes into which the products of combustion pass mixed with heated atmospheric air from said air passage, said regenerative device comprising a closed chamber provided with partition members forming a circuitous passage within which a more pipes from said primary combuse I tion chamber whlch also have commun1ca-' complete and intense combustion takes place,

and an eduction pipe leading from said regenerative device, substantially as described.

4. In a furnace, the combination with the fire bowl and combustion chamber thereof, of an outer wall about said fire bowl forming an air space therebetween which has communication with the outer atmosphere, one or more auxiliary combustion chambers mounted upon said furnace and having communication with the primary combustion chamber thereofand with said air space, whereby the gases of combustion fromsaid primary combustion chamber are supplied with heated atmospheric air as they pass into said auxiliary combustion chambers, dampers for controlling the admission of said gases of combustion to said auxiliary. combustion chambers, said auxiliary combustion chambers being provided with partition members forming a circuitous passage therethrough and a connecting pipe into which said auxiliary combustion passages merge, said connecting pipe dis-, charging into the smoke chimney, substantially as and for the purpose described.

5. In a furnace, the combination with the fire bowl and combination chamber thereof, and a grate in the fire bowl, of a plurality of fines within the combustion chamber com-n municating at their upper and lower ends with the combustion chamber to receive gases "and products of combustion from the burning fuel, an outlet from each fine to the exterior for th'e'products of combustion'and gases, means for supplying air to the products of combustion and gases as they enter the outlets, a common auxiliary combustion ch amber chamber encircling in greater part the com bustion chamber and connected with each of said outlets, said auxiliary combustion chamber being constructed to afiord a oirchamber, and means for distributing the cultous path tor the hot produc'ts of comheated a1r from szud casmg. bustion as and air to cause a more thorou 'h F ANI .D YLE. nnxture and combustlon, an outlet from sald R G S J O auxlhary ooinbustlon chamber, an outer Witnesses:

" casing or shell containing the fire bowl com- JULIA M. BRISTOL,

bustlon chamber and aux'lhary combustlon WILLIAM R. LITZENBERG.

Copies of this patent may be obtained for fi ve cents eech, by aldressing she Commissioner of Iatents,

Washington, D. C. 

